Bayern Munich chief executive Karl-Heinz Rummenigge says he told Manchester United they should stop contacting him about Thomas Muller.
The Bundesliga club claimed they rejected a "very high" offer for the Germany forward over the summer amid interest from United, and the Bayern Munich executive says any future contact regarding Muller is "useless".
"I am not a banker. We are a football club," Rummenigge told German television station Sport1. "That is why we never even considered selling Thomas Muller.
"I told my colleagues at Manchester United: 'I cannot close down my email account, but you no longer need to send me anything. It is useless.'"
Muller, who scored twice in Bayern's 5-1 victory over Borussia Dortmund on Sunday, is a key player for Pep Guardiola, and Rummenigge confirmed last month that he is not for sale at any price.
"He's under contract for another four years," said Rummenigge.
"He'll stay - no matter what is offered. There is no price I would even start considering it."
The reigning Bundesliga champions have started the season in perfect form - they have won all 10 of their games in league and Champions League competition so far this season.
Muller is set to join up with Joachim Low's Germany squad this week as they prepare for matches against the Republic of Ireland and Georgia.
The 2014 World Cup winners need one more point to guarantee qualification for next year's European Championship in France.
Muller, with eight goals from seven games, is the second highest scorer in the qualification stage behind his Bayern Munich team-mate Robert Lewandowski.